222403212 has 48 divisors (see below), whose sum is σ = 582338400. Its totient is φ = 73396800.

The previous prime is 222403141. The next prime is 222403271. The reversal of 222403212 is 212304222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714 + ... + 21102.

It is an arithmetic number, because the mean of its divisors is an integer number (12132050).

Almost surely, 2^222403212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222403212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291169200).

222403212 is an abundant number, since it is smaller than the sum of its proper divisors (359935188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222403212 is a wasteful number, since it uses less digits than its factorization.

222403212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20503 (or 20495 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 222403212 is about 14913.1891961445. The cubic root of 222403212 is about 605.8712597807.

Adding to 222403212 its reverse (212304222), we get a palindrome (434707434).

It can be divided in two parts, 22240 and 3212, that added together give a palindrome (25452).

The spelling of 222403212 in words is "two hundred twenty-two million, four hundred three thousand, two hundred twelve".